//
// Created by Dusan Klinec on 10/05/2018.
//

#if USE_MONERO

#ifndef TREZOR_CRYPTO_XMR_H
#define TREZOR_CRYPTO_XMR_H

#include "../ed25519_donna/ed25519_donna.h"
#include "../hasher.h"

extern const ge25519 ALIGN(16) xmr_h;

typedef unsigned char xmr_key_t[32];

typedef struct xmr_ctkey {
    xmr_key_t dest;
    xmr_key_t mask;
} xmr_ctkey_t;

/* sets H point to r */
void ge25519_set_xmr_h(ge25519* r);

/* random scalar value */
void xmr_random_scalar(bignum256modm m);

/* cn_fast_hash */
void xmr_fast_hash(uint8_t* hash, const void* data, size_t length);

/* incremental hashing wrappers */
void xmr_hasher_init(Hasher* hasher);
void xmr_hasher_update(Hasher* hasher, const void* data, size_t length);
void xmr_hasher_final(Hasher* hasher, uint8_t* hash);
void xmr_hasher_copy(Hasher* dst, const Hasher* src);

/* H_s(buffer) */
void xmr_hash_to_scalar(bignum256modm r, const void* data, size_t length);

/* H_p(buffer) */
void xmr_hash_to_ec(ge25519* P, const void* data, size_t length);

/* derivation to scalar value */
void xmr_derivation_to_scalar(bignum256modm s, const ge25519* p, uint32_t output_index);

/* derivation */
void xmr_generate_key_derivation(ge25519* r, const ge25519* A, const bignum256modm b);

/* H_s(derivation || varint(output_index)) + base */
void xmr_derive_private_key(
    bignum256modm s,
    const ge25519* deriv,
    uint32_t idx,
    const bignum256modm base);

/* H_s(derivation || varint(output_index))G + base */
void xmr_derive_public_key(ge25519* r, const ge25519* deriv, uint32_t idx, const ge25519* base);

/* aG + bB, G is basepoint */
void xmr_add_keys2(ge25519* r, const bignum256modm a, const bignum256modm b, const ge25519* B);
void xmr_add_keys2_vartime(
    ge25519* r,
    const bignum256modm a,
    const bignum256modm b,
    const ge25519* B);

/* aA + bB */
void xmr_add_keys3(
    ge25519* r,
    const bignum256modm a,
    const ge25519* A,
    const bignum256modm b,
    const ge25519* B);
void xmr_add_keys3_vartime(
    ge25519* r,
    const bignum256modm a,
    const ge25519* A,
    const bignum256modm b,
    const ge25519* B);

/* subaddress secret */
void xmr_get_subaddress_secret_key(
    bignum256modm r,
    uint32_t major,
    uint32_t minor,
    const bignum256modm m);

/* Generates Pedersen commitment C = aG + bH */
void xmr_gen_c(ge25519* r, const bignum256modm a, uint64_t amount);

#endif // TREZOR_CRYPTO_XMR_H

#endif // USE_MONERO
